51444157 has 2 divisors, whose sum is σ = 51444158. Its totient is φ = 51444156.

The previous prime is 51444143. The next prime is 51444199. The reversal of 51444157 is 75144415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45239076 + 6205081 = 6726^2 + 2491^2 .

It is a cyclic number.

It is not a de Polignac number, because 51444157 - 2¹¹ = 51442109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51444137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722078 + 25722079.

It is an arithmetic number, because the mean of its divisors is an integer number (25722079).

Almost surely, 2^51444157 is an apocalyptic number.

It is an amenable number.

51444157 is a deficient number, since it is larger than the sum of its proper divisors (1).

51444157 is an equidigital number, since it uses as much as digits as its factorization.

51444157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 31.

The square root of 51444157 is about 7172.4582257410. The cubic root of 51444157 is about 371.9164190573.

It can be divided in two parts, 51444 and 157, that multiplied together give a palindrome (8076708).

The spelling of 51444157 in words is "fifty-one million, four hundred forty-four thousand, one hundred fifty-seven".